The principal use of the T-27 during its service life was as a reconnaissance vehicle.

Some of them are listed below with principal uses.

The principal agricultural use for these lands is sheep grazing.

Its principal use is to strike at adversaries outside of his sword's range.

The principal use of the BA-20 was as a scout vehicle.

The principal uses of the simple present are given below.

Its principal use is in making molds for metal casting.

Its principal use is in the manufacture of chewing tobacco.

The station's principal use over the years was by railway workers at the workshop and shed described below.

Tetragonic Lines are so called from their principal use, which is to square all regular areas and the circle as well.